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Date: Fri, 4 Mar 2011 20:39:08 -0800 (PST)
From: Kelly Troyer <keltro@att.net>
Subject: Re: Knock sensor and indicator
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-4891393@logan.com>
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John,=0A=A0=A0=A0 =A0Chris is using Tracy's apex seals (2mm) which are fair=
ly tough and is only =0Ausing =0A=0Aabout 3 psi boost so any ideas on what =
is causing=A0detonation =0A?............Perhaps too=A0 =0A=0Amuch ignition =
timing or=A0mixture problems such as spending to much time at best =0Apower=
 mixture (1700+ f EGT) instead of richer than best power before leaning =0A=
quickly to=A0lean of peak=A0EGT..........What EGT temps do you routinely se=
e during=0Atakeoff, climb and cruise ?..........Do you aggressively lean at=
 cruise =0A?............=0A=0AThanks,=A0=A0=0A=A0=0AKelly Troyer=0A"DYKE DE=
LTA JD2" (Eventually)=0A"13B ROTARY"_ Engine=0A"RWS"_RD1C/EC2/EM2=0A"MISTRA=
L"_Backplate/Oil Manifold=0A"TURBONETICS"_TO4E50 Turbo=0A=0A=0A=0A=0A______=
__________________________=0AFrom: John Slade <jslade@canardaviation.com>=
=0ATo: Rotary motors in aircraft <flyrotary@lancaironline.net>=0ASent: Fri,=
 March 4, 2011 4:30:29 PM=0ASubject: [FlyRotary] Re: Knock sensor and indic=
ator=0A=0AOn 3/4/2011 4:43 PM, Kelly Troyer wrote:=0A> engine runs reported=
 by Chris at high manifold pressure, high coolant temps and =0A>as you ment=
ioned=0A> probably high intake temps with little or no airflow across the =
=0A>intercooler.............=0AI did many, many engine runs and high speed =
taxi tests prior to flight, often =0Awith the temps at the limits. On occas=
ion I was able to hear "pre-ignition" and =0Aback off the throttle. There w=
as no sign of damage to my seals - but mine are =0A3mm 'indestructible' sea=
ls from Tracy.=0AJohn Slade=0A=0A--=0AHomepage:=A0 http://www.flyrotary.com=
/=0AArchive and UnSub:=A0 http://mail.lancaironline.net:81/lists/flyrotary/=
List.html=0A
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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></he=
ad><body><div style=3D"font-family:arial, helvetica, sans-serif;font-size:1=
4pt"><DIV></DIV>=0A<DIV>John,</DIV>=0A<DIV>&nbsp;&nbsp;&nbsp; &nbsp;Chris i=
s using Tracy's apex seals (2mm) which are fairly tough and is only using <=
/DIV>=0A<DIV>about 3 psi boost so any ideas on what is causing&nbsp;detonat=
ion ?............Perhaps too&nbsp; </DIV>=0A<DIV>much ignition timing or&nb=
sp;mixture problems such as spending to much time at best </DIV>=0A<DIV>pow=
er mixture (1700+ f EGT) instead of richer than best power before leaning <=
/DIV>=0A<DIV>quickly to&nbsp;lean of peak&nbsp;EGT..........What EGT temps =
do you routinely see during</DIV>=0A<DIV>takeoff, climb and cruise ?.......=
...Do you aggressively lean at cruise ?............</DIV>=0A<DIV>&nbsp;</DI=
V>=0A<DIV>Thanks,&nbsp;&nbsp;<BR>&nbsp;</DIV>=0A<P>Kelly Troyer<BR><STRONG>=
<FONT size=3D4>"DYKE DELTA JD2"</FONT> <FONT size=3D1>(Eventually)</FONT></=
STRONG></P>=0A<P>"13B ROTARY"_ Engine<BR>"RWS"_RD1C/EC2/EM2<BR>"MISTRAL"_Ba=
ckplate/Oil Manifold</P>=0A<P>"TURBONETICS"_TO4E50 Turbo</P>=0A<DIV><BR></D=
IV>=0A<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 1=
4pt"><BR>=0A<DIV style=3D"FONT-FAMILY: times new roman, new york, times, se=
rif; FONT-SIZE: 18pt"><FONT size=3D2 face=3DTahoma>=0A<HR SIZE=3D1>=0A<B><S=
PAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> John Slade &lt;jslade@cana=
rdaviation.com&gt;<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B> R=
otary motors in aircraft &lt;flyrotary@lancaironline.net&gt;<BR><B><SPAN st=
yle=3D"FONT-WEIGHT: bold">Sent:</SPAN></B> Fri, March 4, 2011 4:30:29 PM<BR=
><B><SPAN style=3D"FONT-WEIGHT: bold">Subject:</SPAN></B> [FlyRotary] Re: K=
nock sensor and indicator<BR></FONT><BR>On 3/4/2011 4:43 PM, Kelly Troyer w=
rote:<BR>&gt; engine runs reported by Chris at high manifold pressure, high=
 coolant temps and as you mentioned<BR>&gt; probably high intake temps with=
 little or no airflow across the intercooler.............<BR>I did many, ma=
ny engine runs and high speed taxi tests prior to flight, often with the te=
mps at the limits. On occasion I was able to hear "pre-ignition" and back o=
ff the throttle. There was no sign of damage to my seals - but mine are 3mm=
 'indestructible' seals from Tracy.<BR>John
 Slade<BR><BR>--<BR>Homepage:&nbsp; http://www.flyrotary.com/<BR>Archive an=
d UnSub:&nbsp; http://mail.lancaironline.net:81/lists/flyrotary/List.html<B=
R></DIV></DIV></div></body></html>
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